docs: def notificationResponse():
      """NOTIFICATION RESPONSE Section 9.1.21d"""
      a = TpPd(pd=0x6)
      b = MessageType(mesType=0x26)  # 00100110
      c = MobileStationClassmark2()
      d = MobileId()
      e = DescriptiveGroupOrBroadcastCallReference()
      packet = a / b / c / d / e
      return packet